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[Qemu-devel] [PATCH v6 57/77] mips_malta: Fix semihosting argument passi
From: |
Stefan Markovic |
Subject: |
[Qemu-devel] [PATCH v6 57/77] mips_malta: Fix semihosting argument passing for nanoMIPS bare metal |
Date: |
Thu, 2 Aug 2018 16:16:44 +0200 |
From: Stefan Markovic <address@hidden>
Signed-off-by: Yongbok Kim <address@hidden>
Signed-off-by: Aleksandar Markovic <address@hidden>
Signed-off-by: Stefan Markovic <address@hidden>
---
hw/mips/mips_malta.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/hw/mips/mips_malta.c b/hw/mips/mips_malta.c
index d1a7c1f..8bb1686 100644
--- a/hw/mips/mips_malta.c
+++ b/hw/mips/mips_malta.c
@@ -643,7 +643,12 @@ static void write_bootloader_nanomips(uint8_t *base,
int64_t run_addr,
stw_p(p++, 0x8000); stw_p(p++, 0xc000); /* nop */
/* to_here: */
- stw_p(p++, 0x0080); stw_p(p++, 0x0002); /* li a0,2 */
+ if (semihosting_get_argc()) {
+ /* Preserve a0 content as arguments have been passed */
+ stw_p(p++, 0x8000); stw_p(p++, 0xc000); /* nop */
+ } else {
+ stw_p(p++, 0x0080); stw_p(p++, 0x0002); /* li a0,2 */
+ }
stw_p(p++, 0xe3a0 | NM_HI1(ENVP_ADDR - 64));
stw_p(p++, NM_HI2(ENVP_ADDR - 64));
/* lui sp,%hi(ENVP_ADDR - 64) */
--
1.9.1
- [Qemu-devel] [PATCH v6 47/77] target/mips: Implement CP0 Config1.WR bit functionality, (continued)
- [Qemu-devel] [PATCH v6 47/77] target/mips: Implement CP0 Config1.WR bit functionality, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 48/77] target/mips: Adjust exception_resume_pc() for nanoMIPS, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 49/77] target/mips: Adjust set_hflags_for_handler() for nanoMIPS, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 50/77] target/mips: Adjust set_pc() for nanoMIPS, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 51/77] target/mips: Fix ERET/ERETNC behavior related to ADEL exception, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 52/77] elf: Add nanoMIPS specific variations in ELF header fields, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 53/77] elf: Relax MIPS' elf_check_arch() to accept EM_NANOMIPS too, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 54/77] elf: Don't check FCR31_NAN2008 bit for nanoMIPS, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 55/77] mips_malta: Add basic nanoMIPS boot code for MIPS' Malta, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 56/77] mips_malta: Setup GT64120 BARs in nanoMIPS bootloader, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 57/77] mips_malta: Fix semihosting argument passing for nanoMIPS bare metal,
Stefan Markovic <=
- [Qemu-devel] [PATCH v6 58/77] gdbstub: Disable handling of nanoMIPS ISA bit in the MIPS gdbstub, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 59/77] gdbstub: Add XML support for GDB for nanoMIPS, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 60/77] target/mips: Add definition of nanoMIPS I7200 CPU, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 61/77] linux-user: Add syscall numbers for nanoMIPS, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 62/77] linux-user: Add target_signal.h header for nanoMIPS, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 63/77] linux-user: Add termbits.h header for nanoMIPS, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 64/77] linux-user: Update syscall_defs.h header for nanoMIPS, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 65/77] linux-user: Add target_fcntl.h header for nanoMIPS, Stefan Markovic, 2018/08/02
- [Qemu-devel] [PATCH v6 66/77] linux-user: Add sockbits.h header for nanoMIPS, Stefan Markovic, 2018/08/02